Crankpin bearing



Feb. Z1, 1939. T. v. BucKwALTER CHANKPIN BEARING Filed Nov. 14, 1936 2 Sheets-Sheet l V. au. I CMJGM.

Feb. 2l, 1939-. T. v. BUCKWALTER CRANKP IN BEARI NG 2 Sheets-Sheet 2 Filed Nov. 14, 1936 /NVf'N To E:

Paiemed Feb.21,1939 r I I 2,148,149

UNITED STATES PaTlazNT OFFICE oaANxPIN Ymarianna Tracy V. Buckwalter, Canton, Ohio, assignor to The Timken Roller Bearing Company, Canton, Ohio, a corporation of Ohio Application November 14, 1936, Serial No. 110,826 6 Claims. (Cl. 'Z4- 580) My invention relates to bearings for locomotive main bushing I2. Said ring is held in place by and other crank pins.v It has for its principal obsaid securing ring I which overlaps it. Said ject a plain bearing arrangement for such crank main bushing I2 has an annular an'ge I5 near pins which has many of the advantages of the its innermost endwithailat inner face.

5 roller bearing crank pin construction of my Pat- Mounted on the main bushing I2 by means o f 5 ent No, 1,951,126. Other objects are strength and a circular-eye IB is the main drive ,rod I1, the eye simplicity of construction, easy assembly and dispreferably having a liner ring I8 of bronze or assembly of the bearings, adequate lubrication otherr suitable bearing metal. 'I'he main rod I1 and accommodation of the cooking of drive rods extends forwardly tothe cross head fof the locomo- 10 which necessarily occurs in locomotive service. tive (not shown) by which it is driven and to 1o The invention consists in the crank pin bearing which it is connected in any suitable way.

and in the parts and combinations and arrange- Similarly mounted on the main bushing I2 outments of parts hereinafter described and claimed. wardly of the main rod I1 is a rear side rod I9 In the accompanying drawings, having an eye 20 lined with a bearing ring 2|.

Fig.y 1 is a sectional view of a main crank pin Said rear side rod I9 extends rearwardly to the 1li bearing embodying myinvention, together with crank pin 22 of the next adjacent drive wheel portions ofthe locomotive drive rods; .23. The bearing for said crank pin is illustrated Fig. 2 is a horizontal sectional view through a as being a roller bearing of the kind shown in said plurality of crank pin bearings and-drive rods; Patent No. 1,951,126,'comprising two cones 24 or Fig. 3 is a sectional view of therear wheel roller inner bearing members mountedpn said crank 20 bearing; and I pin 22, with their raceways tapering towards Fig. 4 isa sectional view of the front wheel each other, taper rollers 25 on said raceways and bearing.vv a double bearing `cup 26 rotatable in a bearing In Fig. 1 is illustrated the hollow main crank ring 21 mounted in the ,eye 20 of said rear side pin Il of a locomotiveV drive wheel 2. r The innerrod I9. A cap 28 secured to the end of the crank 25 most portion 3 of said crank pin, that is the porpin 22 holds the bearing cones in place. Rings tion adjacent to the-wheel, is of larger outside 29 on said cup 26 constitute abutments for the diameter than the body portionlioutwardly thereside rod I9 but are spaced apart suliciently to of and the outermost end portion 5 is further accommodate cooking 0f Said IOd.

30 reduced in diameter. Mounted on the main bushing I2 adjacent to '3o Rotatably mounted on the enlarged innermost said rib I5 is a channel shaped split spacer memportion 3 of the crank pin I, adjacent to the ber 30 secured'together by bolts 3| and nuts 32. Wheel hub, is a plain bearing, preferably a sleeve The distance from said ring I3 to said spacer 30 6 of bronze o'r other bearing metal. Rotatably is greater than the combined width of the main mounted on the reduced body portion 4 Aof the Vrod I1 and the rear side rod I9. Thus thelcocking 35 crank pin adjacent to said innermost portion 3 of the rods, incident to locomotive service, is acis a second bearing sleeve 1, also of bronzeor commodated. The dotted lines in the drawings other suitable bearing metal, whose outside diamshow the rods in cocked position. eter is the same as the outside diameter of the A front side rod 33 whose eye 34 is provided 40 above mentioned bearing sleeve 6 and whose inwith a bearing ring 35 is mounted on said main 40 nermost end isv seated against the shoulder 8 bushing I2 on the other side of said spacer 3l) formed by the end of the enlarged innermost from the main rod I1. The front side rod 33 portion of the crank pin. Fixed on the outermost extends forwardly to the crank pin 36 o f the next end portion 5 of the crank pin I, as .by dowel adjacent locomotive drive wheel 31. Rotatably pins 9, is a securing ring I0 which has a flat inner mounted on said crank pin 3G is a bushing 38 of 45 face II bearing against the outer end of the bronze or other bearing material, on which is floating' bronze bushing 1 and projecting radially rotatably mounted a 'main bushing 39 of cast therebeyond. Rotatable on the bushing and the iron or other hard metal that is rotatable in bushing 1 is a main bushing sleeve I2, which is another bearing ring 35 inthe other eye 34 of said preferably of iron or steel or other hard, strong crank pin. Said bushing is provided with rings 5o metal. This main bushing I2 is held in place by 4t similar to those of the other floating bushings means of a ring I3 mounted on the outermost t and 1. A cap ti secured to the end oi the crank end of the oating bushing 1 and having an in pin 99 has an annular zone M engaging the end warlly projecting flange it around the periphery of said floating bushing 99, an inwardly stepped of its inner face, overlapping the outer end of the annular zone it that overlaps Said line hushou ing 38 and that engages the end oi said main bushing 39 and an inwardly stepped peripheral zone 44 that overlaps said main bushing and serves as a stop for the side rod 3l. A flange 45 on said main bushing iorms a stop for the other side of said side rod 3l, the two stops being spaced apart to accommodate cocking of the rod.

Mounted in the bore of the main crank pin I is a lubricating device 46, preferably of the type disclosed in my Patent No. 2,040,803. 'I'he crank pin I is provided with radial passageways 41 therethrough and the iioating bushing 6 and the floating bushing 1 are also provided with a plurality of radial passageways 48 therethrough. The main bushing I2 is provided with radial passageways 49 whose outer ends open n into annular recesses B extending around the outer periphery of the main bushing I2 within the sev eral bearing liners. The radial passageways 49 in said bushing are preferably provided with suitable wick members II, Thus, lubricant from the crank pin bore passes through the passageways 41 of the crank pin, the passageways 48 of the i'ioating bushings and the passageways 48 of the main bushing into the annular peripheral passageways 50 where it is distributed over the bronze liner members. The passageways 41 of the' crank pin are not in direct alinement with those 48 of the iioating bushings and the passageways 4I oi the iloating bushings are not in direct alinement with those 4l ot the main bushing, so that some of the oil iinds its way into the spaces between the crank pin I and the iioating bushings 6 and 'I and the space between the iloating bushings. and the main bushing I2. Thus all moving parts are adequately lubricated, the now of lubricant being controlled by the lubricating device 4t in the crank pin. To prevent escape of lubricant, split rings 5,2, similar to the commonly used piston rings, are seated in annular grooves 5l near the ends oi the iloating bushings 6 and 1, bearing against the inner periphery of the main bushing I2. Thus, outward escape oi' the lubricant at these points is prevented and an internal pressure is built up that forces the lubricant to spread along the several bearing surfaces.

It will be seen that the above bearing is one that can be used on stepped crank pins similar to those now commonly in use and that it can be easily substituted tor the roller bearing arrangement ot my Patent No. 1,951,126. Cooking .of the main rod and side rods, which is inevitable in service, is accommodated without destroying the ruil-surface bearing of the crank pins on the iloating bushings and the main bushings. The use of two iloating bushings permits the relative lmovement between them that is likely to occur due to the larger load on the larger iloating bushing. 'Ihe load from piston to crank pins is largely transmitted through the main bushings instead of passing through the bearings and the main bushing is preferably made of iron or steel or other strong material so as to have greater load carrying and transmitting capacity.

It is obvious that bearings of the kind above described may be placed on the crank pins of locomotive drive arrangements of all kinds, from a simple single drive wheel and single drive rod arrangement up to the largest multiple drive wheel arrangements. Likewise, the plain bearing arrangement may be used on. all crank pins or on the main crank pin and one or more of the other crank pins, while still other crank pins have roller bearings oi the kind shown in my said Patent No. 1,951,126. Obviously, numerous changes may be made without departing from the invention and I do not wish to be limited to the precise construction shown.

What I claim is:

1. A locomotive rod bearing comprising a stepped crank pin, a main rod having an eye receiving the reduced body portion of said crank pin, a side rod having an eye receiving the larger innermost portion oi.' said crank pin, floating bushings mounted respectively on said reduced body portion and said larger innermost portion of said crank pin, said bushings having the same outside diameter, a iloating main bushing mounted on said ilrst mentioned floating bushings, said main rod and said side rod being journaled on said main bushing and bushing rings in said eyes of said rods for cooperating with said main bushing.

2. A locomotive rod bearing comprising a stepped vcrank pin, a main rod having an eye receiving the reduced body portion oi.' said .crank pin, a side rod having an eye receiving the larger innermost portion of said crank pin, iloating bushings mounted respectively on said reduced body portion and said larger innermost portion of said crank pin. said bushings having the same outside diameter, a iloating main bushing mounted on said ilrst mentioned iioating bushings, said crank pin, oa'ting bushings and main bushing having radial lubricant passageways therethrough, said main rod and said side rod being Journaledon said main bushing and bushing rings in said eyes oi' said rods for cooperation with said main bushing.

3. A `locomotive rod bearing comprising a stepped crank pin, a main rod having an eye receiving the reduced body portion of said crank pin, a side rod having an eye receiving the larger innermost portion oi' said crank pin, floating bushings mounted respectively on said reduced body portion and said larger innermost portion oi' said crank pin, said bushings having the same outside diameter, a iloating main bushing mounted on said first mentioned floating bushings, said crank pin. floating bushings and main bushing having radial lubricant passageways therethrough, said eways being out of alinement with respect to each other, said main rod and said side rod being journaled on said main bushing and bushing rings in said eyes of said rods for cooperation with said main bushing.

4. A locomotive rod bearing comprising a stepped crank pin, a main rod having an eye receiving the reduced body portion of said crank pin, a side rod having an eye receiving the larger innermost portion of said crank pin, iloating bushings mounted respectively on said reduced body portion and said larger innermost portion of said crank pin, said bushings having the same outside diameter, a iloatingmain bushing mounted on said rst mentioned iloating bushings, said crank pin, Aiioating bushings and main bushing having radial lubricant passageways therethrough, sealing rings in the ends of said iioating bushing bearing against the bore oi said main bushing, said main rod and said side rod being Journaled on said main bushing and bushing rings in said eyes of said rods for cooperation with said main bushing.

5. A locomotive rod bearing comprising a stepped crank pin, a mainA rod having an eye receiving the reduced body portion oi.' said crank pin, a side rod having an eye receiving the larger innermost portion of said crank pin, oating bushings mounted respectively on said reduced Vhodylriortionaminaidiargerportion oi said crank pin, said bushings having the same outside diameter, a iioating main bushing mount ed on said rst mentioned oatingbushings. said main rod and said side rod being iournaied 'on saidmainbushinmbushingringsinsaideyesoi said rods for cooperation with said main bushing and abutment means for' said main rod and saidsiderodspaoedthereiromsumcintlytoperlo mit cooking thereof.

6. A ioeomotiverod bearing -oomprising a stepped crankvlmamainrodhavinganeye receiving the reduced body portion .oi said'crank pin. a rear side rod outwardly oi' said main rod having an eye receiving said body portion of said crank pin, a front side rod having an eye receivingthelargerilnnermoei:portionoisaidoi'lmk pin, floating bushings mounted respectively on/ said reduced bodyportion and-.said larger inner# mostfportion ot said crank pin. said bushings havingthesameoutaidediametenaoatingmnn bushingmountedonsaidnrstmmtionedoating hummm spacer :fixed on momia bushing between said main rod and said front side rod. a

ing.thespaoebetweensaidrin`gandsaidspaeor` being larger than the combined width of main 'rod and side and the between said spoeer Y, A,on main bushing being largerV the width of iront side rod whereby o! said yi'ods accommodated.

- TRACYlBUCKWAI-TIR. 

